1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b3cd1e5eefb729c24c019b0791c36db2ac66f08b22921ead24650691338185. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23e27eb3-a8b6-4276-ad38-6312ab467ad6.json and https://artists.proofprofile.net/proofs/artist/23e27eb3-a8b6-4276-ad38-6312ab467ad6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1626f132358addc1bd0588d111fc16945d1e14fc08e41469919a8f44a51e06. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP42162002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7d521f00a67d5a003f37bf66d57766e43ecb299290bb3e9bb7950206bd9e36. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2145599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e75c169894b6a2ea93eee1a03848b508d23f1444ae64578edf666c748d1320. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHA012200507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb390c6445bd77c75e6bf5bdd69dcd19d4c42f31344421f873755ae7d403a0c6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:09:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHA012200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c84d9127635f33f678876e45b8605647ca6efb279e4b26af1d8dd1ef3e1897. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHA012200508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51894a0cb9b04259c4794ca0e36bcbae02fc6feb1786944e811caaddc16501a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4132400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2379375e19767623e915943ec6423c937b94f9f6991e2387bde131bf1af6197b. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4132400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7080113728734388cd3571c8e247f408688cf9d5a8835494bc796fe2079fcfe7. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4132400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c6de50ff33a4676928e217bb59ab2f96c1a0c45f49ce62e1f1dbaa10146b40. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4132400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094d096e009aaa6b8128b64fbb8cd39af33ce7c940a06db67879c85e1cede3a7. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4132500116.